Pictures: Poland v Russia Euro 2012 violence

Police in riot gear stand inisde the stadium during the UEFA EURO 2012 group A match between Poland and Russia at The National Stadium on June 12, 2012 in Warsaw, Poland.

A handcuffed Polish fan lies flat on the street prior to the Euro 2012 soccer championship Group A match between Poland and Russia in Warsaw, Poland, Tuesday, June 12, 2012. Russian soccer fans clashed with police and Poland supporters in separate incidents in Warsaw on Tuesday, just hours before the two teams were to meet in an emotionally charged European Championship match. Several people were injured.

Polish fans light fireworks as they clash with police during the Euro 2012 soccer championship group A match between Poland and Russia in Warsaw

Police detain a Polish football fan after clashes between Polish and Russian football fans in Warsaw on June 12, 2012, ahead of the Euro 2012 championships football match Poland vs Russia. Police used water cannon and tear gas on unruly Euro 2012 fans in Warsaw as Poland geared up to play old foe Russia in a must-win Euro 2012 match.

Polish anti-riot policemen detain Polish football fan after tension posed the city’s “greatest ever” security challenge on June 12, 2012 in Warsaw, ahead of the Euro 2012 championships football match Poland vs Russia. Police used water cannon and tear gas on unruly Euro 2012 fans in Warsaw today as Poland geared up to play old foe Russia in a must-win Euro 2012 match.

Police hold rubber bullet guns as Polish fans clash with police during the Euro 2012 soccer championship group a match between Poland and Russia in downtown Warsaw, Poland , Tuesday, June 12,

Unruly Polish fans tear up road blockades as they clash with police in Warsaw prior to the Euro 2012 championships football match Poland vs Russia on June 12, 2012

Polish fans clash with police during the Euro 2012 soccer championship group a match between Poland and Russia in downtown Warsaw, Poland , Tuesday, June 12, 2012.

An injured Polish soccer fan lies on the ground in Warsaw June 12, 2012.

A Russian soccer fan gestures to Polish fans as he walks protected by Polish riot police in Warsaw June 12, 2012.

Polish soccer fans shout as Russian fans march to the National Stadium in Warsaw, June 12, 2012.

Police arrest a Polish fan during clashes between young Poles and the police during the Euro 2012 soccer championship group a match between Poland and Russia in downtown Warsaw, Poland , Tuesday, June 12, 2012.

A Polish soccer fan lies on the ground after clashing with Russian supporters in Warsaw, June 12, 2012. Russia on Tuesday will play Poland in their Euro 2012 Group A soccer tournament in Warsaw.

Polish soccer fans speak to riot police protecting Russian fans marching to the National Stadium in Warsaw, June 12, 2012. Russia on Tuesday will play Poland in their Euro 2012 Group A soccer tournament in Warsaw.

Plain clothed police detain a Polish fan during the Euro 2012 soccer championship group a match between Poland and Russia in downtown Warsaw

A Polish soccer fan argues with police prior to the Euro 2012 group A soccer match between Poland and Russia in Warsaw, Poland , Tuesday, June 12, 2012.